scholarly journals Seasonal Distributions, and Risk Assessment of Polychlorinated Biphenyls (PCBs) in the Surficial Sediments from the Turag River, Dhaka, Bangladesh

2021 ◽  
Author(s):  
Nushrat Jahan Chowdhury ◽  
Mashura Shammi ◽  
Md. Mostafizur Rahman ◽  
Md. Ahedul Akbar ◽  
Md. Khabir Uddin
Keyword(s):  
Risk Assessment ◽  
Polychlorinated Biphenyls ◽  
Potential Risk ◽  
Surface Sediments ◽  
Biological Effects ◽  
Sediment Quality ◽  
Sediment Quality Guideline ◽  
Post Monsoon ◽  
Quality Guideline ◽  
Effect Level

Abstract Polychlorinated biphenyls (PCBs) assessment in sediments of Turag River, Dhaka, Bangladesh has been conducted for the first time. This River provides critical ecological services to agriculture, industry, and transportation. However, the Turag River is one of the most industrially polluted rivers surrounding Dhaka in Bangladesh. In this study, six PCB congeners namely PCB 10, PCB 28, PCB 52, PCB 138, PCB 153, and PCB 180, were analyzed in surface sediments by GC-ECD at 9 sampling sites. Pre-monsoon and post-monsoon season sampling were collected in this study. The total concentrations of PCBs varied from 344.49 to 0.22 ng/g dw and 10.6 to 1.68 ng/g dw in pre-monsoon and post-monsoon, respectively. The paramount contributor congener to the total PCBs was PCB 180 and was found at all sites. The ecological risk assessment indicated a high potential risk in pre-monsoon (Eri = 277.32) and low potential risk in post-monsoon (Eri = 25.69). Sediment quality guideline quotients (SQGQs) showed that PCBs in pre-monsoon would cause no or moderate biological effects on organisms at most sampling sites except in surface sediments of site S5 (high biological effects), while no adverse ecotoxicological effect was observed in post-monsoon. Considering both probable effect level (PEL) and threshold effect level (TEL), the new sediment quality guideline quotient (NSQGQ) showed that in post-monsoon PCBs contamination would cause moderate biological effects, while in pre-monsoon the findings remained consistent with the findings of SQGQ. This study gave a quick look at the PCB contamination scenario in the Turag River sediments and also allowed for a comparison between the investigated River and other rivers worldwide.

scholarly journals Speciation Variation and Comprehensive Risk Assessment of Metal(loid)s in Surface Sediments of Intertidal Zones

2018 ◽  
Vol 15 (10) ◽  
pp. 2125 ◽  
Author(s):  
Baocui Liang ◽  
Xiao Qian ◽  
Shitao Peng ◽  
Xinhui Liu ◽  
Lili Bai ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Surface Sediments ◽  
Yellow River ◽  
Biological Effects ◽  
Risk Index ◽  
Sediment Quality ◽  
Residual Fraction ◽  
Intertidal Zones ◽  
Probable Effect Level ◽  
Effect Level

Speciation variation and comprehensive risk assessment of metal(loid)s (As, Cd, Cr, Cu, Mn, Ni, Pb and Zn) were investigated in surface sediments from the intertidal zones of the Yellow River Delta, China. Results showed that only the concentrations of As, Cd and Pb were significantly different between April and September (p < 0.01). In April, the residual fraction (F4) was predominant for As, Cr, Cu, Ni and Zn. However, the exchangeable and carbonate-associated fraction (F1) was dominant for Cd averaging 49.14% indicating a high environmental risk. In September, the F4 fraction was predominant and the F1 fraction was very low for most metal(loid)s except Cd and Mn. The geo-accumulation index (Igeo), the F1 fraction and potential ecological risk index (PERI) of most metal(loid)s were relatively low in surface sediments for both seasons. But Pb, As and Ni were between the threshold effect level (TEL)and the probable effect level (PEL) for 66.67%, 83.33% and 91.67% in April and As and Ni were between TEL and PEL for 41.67% and 91.67%, which indicated that the concentration of them was likely to occasionally exhibit adverse effects on the ecosystem. Although the Igeo, the F1 fraction or PERI of Cd in both seasons was higher at some sites, the results of sediment quality guidelines (SQGs) indicated that the biological effects of Cd were rarely observed in the studied area.

scholarly journals Geochemical Assessment of Trace Metal Distribution and Contamination in the Surface Sediments of the Coast of Okinawa Island, Japan

2016 ◽  
Vol 6 (1) ◽  
pp. 1
Author(s):  
Ibrahima M'Bemba Diallo ◽  
Hiroaki Ishiga
Keyword(s):  
Environmental Protection Agency ◽  
Surface Sediments ◽  
Sediment Quality ◽  
Contamination Factor ◽  
Sediment Quality Guideline ◽  
Okinawa Island ◽  
X Ray ◽  
The Us ◽  
Quality Guideline ◽  
Us Epa

In this study, sediment samples were collected from the Awase tidal, the Minamigusuku, and Nakagusuku areas located in the Okinawa Island. The collected samples were analyzed using X-ray fluorescence to determine their geochemical compositions and distribution, and to assess the sediment quality in the study areas. Contamination factor (CF), geoaccumulation index (Igeo), and the United State Environmental Protection Agency Sediment Quality Guideline (US EPA SQG) were used to assess the sediment quality. The results show that the highest average concentrations of As (11mg/kg), Pb (8 mg/kg), Zn (19 mg/kg), Cu (6 mg/kg), and Cr (14mg/kg) occurred in the Minamigusuku area. The CF and Igeo values, and the US EPA SQG indicate that among the selected trace metals only As displays significant values in the study areas. The CF values of As in the Minamigusuku area show moderate enrichment, and in this same area, the Igeo values of As present significant values, ranging from moderate to considerable contaminations, implying a possible effect on the biota in this location. Compared to the US EPA SQG, the Awase tidal flat and Nakagusuku areas are moderately polluted, whereas Minamigusuku is heavily polluted, suggesting that As may possible impact the biota in these areas. Consequently, for a better sustainable development of the coast of  Okinawa Island , a regular monitoring and assessment of study areas, particularly the Minamigusuku area, is necessary to determine over time the concentration of As.

Evaluation of the Status of Copper Contamination of Surface Sediments of Jen-Gen River Estuary, Taiwan

2013 ◽  
Vol 300-301 ◽  
pp. 1381-1384
Author(s):  
Cheng Di Dong ◽  
Yao Ting Tu ◽  
Chiu Wen Chen ◽  
Chih Ming Kao ◽  
Chih Feng Chen
Keyword(s):  
Municipal Wastewater ◽  
Surface Sediments ◽  
Biological Effects ◽  
Sediment Quality ◽  
River Estuary ◽  
River Mouth ◽  
Moderate Degree ◽  
River Bank ◽  
Biological Damage ◽  
Severe Degree

Major objectives of this study are to evaluation the enrichment, accumulation, and potential biological effects of copper (Cu) in the surface sediments of Jen-Gen River estuary, Taiwan. Eleven sampling locations were installed near the mouth of Jen-Gen River to collect sediment samples for analyzing Cu. Results of laboratory analyses show that concentrations of Cu in the sediments are between 67 and 278 mg/kg with an average of 181±61 mg/kg. The spatial distribution of Cu reveals that the Cu concentration is relatively high in the boundary of the river estuary. This indicates that upstream industrial and municipal wastewater discharges along the river bank are major sources of pollution. Results from the enrichment factor (EF) analysis imply that the sediments can be characterized as minor to moderately severe degree of Cu enrichment. Results of geo-accumulation index (Igeo) analysis indicate that the sediments can be characterized as none to moderate degree of Cu accumulation. Base on the comparison with sediment quality guidelines (SQGs), the concentrations of Cu in Jen-Gen River mouth sediments may cause acute biological damage.

scholarly journals Distribusi Spasial, Sumber Pencemaran, dan Kajian Risiko Ekologi Polisiklik Aromatik Hidrokarbon (PAH) dalam Sedimen Pesisir di Pulau Bintan, Indonesia

2019 ◽  
Vol 20 (2) ◽  
pp. 271
Author(s):  
Deny Yogaswara ◽  
Ita Wulandari ◽  
Khozanah Khozanah ◽  
Edward Edward ◽  
Dede Falahudin
Keyword(s):  
Spatial Distribution ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Ecological Risk ◽  
Aromatic Hydrocarbons ◽  
Surface Sediments ◽  
Biological Effects ◽  
Sediment Quality ◽  
Diagnostic Methods ◽  
Small Island ◽  
Polycyclic Aromatic

ABSTRACTBintan Island is the small island in the Riau Archipelago which borders Singapore and Malaysia. Its water is crossed by international shipping lines. Therefore, water quality in this area is potentially polluted by marine activities. The present study aimed to evaluate the concentration, spatial distribution, and assessment of ecological risks of polycyclic aromatic hydrocarbons (PAHs) in surface sediments from selected coastal water of Bintan. Surface sediments in this study were extracted by using the ultrasonic system and determined with GCMS. The data were visualized with ArGIS software for spatial distribution mapping, applied ratio diagnostic methods for the source of PAH contamination, and assess their ecological risk based on sediment quality guidelines. The results showed PAHs concentrations ranged from below the method detection limit (<DL) to 13.492 ng.g−1(dry weight) with the highest concentration of PAHs were detected at TJU 1 station as much as 13.492 ng.g-1. As many as seven types of PAHs were identified in Bintan water, they were Naphthalene (two rings), Fluorene and Anthracene (three rings); fluoranthene, Pyrene, Benzo (a) Pyrene and Chrysene (five rings). Based on diagnostic ratios, the sources of PAHs in this coastal area were mainly from pyrogenic origins. Ecological risk assessment has shown that the average value of ∑10 PAH in Bintan waters (5.855 ng.g-1) is lower than the corresponding ERL, ERM, TEL, and PEL value indicating that the adverse biological effects of PAHs are generally low.Keywords: Polycyclic Aromatic Hydrocarbons (PAHs), Distribution, Pollution, Bintan WatersABSTRAKPulau Bintan merupakan pulau kecil di Kepulauan Riau yang berbatasan langsung dengan negara Singapura dan Malaysia serta perairannya dilintasi oleh jalur pelayaran internasional sehingga potensi pencemaran dari aktivitas di laut sangat tinggi. Penelitian ini bertujuan untuk mengukur konsentrasi, distribusi spasial, sumber asal pencemaran dan analisis resiko lingkungan senyawa PAH dalam sedimen permukaan di perairan pesisir Pulau Bintan. Sedimen permukaan diekstraksi dengan sistem ultrasonik dan dianalisa akhir dengan GCMS. Data senyawa PAH diolah dengan software ArGIS untuk membuat peta distribusi spasial, dianalisa dengan metode diagnosa rasio untuk mengetahui sumber pencemarnya dan dibandingkan dengan nilai baku mutu sedimen untuk mengkaji resiko ekologinya. Hasil analisis di setiap stasiun sampling di Muara Pengudang dan Tanjung Uban menunjukkan konsentrasi Total PAH (TPAH) berkisar antara < limit deteksi alat (1 ngg-1) sampai 13,492 ng.g-1 berat kering dengan konsentrasi tertinggi terdeteksi di stasiun TJU 1 yaitu sebesar 13,492 ng.g-1.  Sebanyak tujuh jenis senyawa PAH teridentifikasi di perairan Bintan ini diantaranya Naphthalene, (dua cincin benzene), Fluorene dan Anthracene (tiga cincin benzene); Fluoranthene, Pyrene, Benzo (a) Pyrene, dan Chrysene (empat cincin benzene). Berdasarkan analisa diagnosa rasio, sumber pencemaran PAH di perairan pesisir Bintan adalah berasal dari kombinasi antara sumber pirogenik. Analisis resiko lingkungan menunjukkan nilai rata-rata ∑10 PAH di perairan Bintan (5,855 ngg-1) masih rendah dibandingkan nilai ERL, ERM, TEL dan PEL, hal tersebut mengindikasikan bahwa efek biologis senyawa PAH secara umum rendah.Kata kunci: Polisiklik Aromatik Hidrokarbon (PAH), Sebaran, Pencemaran, Perairan Bintan

Geochemical speciation and risk assessment of metals in sediments of the Lobo-Broa Reservoir, Brazil

2017 ◽  
Vol 28 (3) ◽  
pp. 430-443 ◽  
Author(s):  
Eduardo Cimino Cervi ◽  
Felippe Fernandes ◽  
Renato Billia de Miranda ◽  
Frederico Fábio Mauad ◽  
Leandro Michalovicz ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Ecological Risk ◽  
Biological Effects ◽  
Sediment Quality ◽  
Aquatic Biota ◽  
Risk Assessment Code ◽  
Content Type ◽  
Total Metal ◽  
Metal Contents ◽  
Geochemical Speciation

Purpose Brazilian sediment quality criteria were established based on pseudo-total metal contents, which is not suitable to determine their bioavailability and the ecological risk for aquatic biota. Therefore, the geochemical speciation of five metals (Cu, Fe, Ni, Pb and Zn) was determined to assess the distribution and ecological risk of sediments in a tropical shallow reservoir from Brazil. The paper aims to discuss these issues. Design/methodology/approach A survey of metals in ten representative stations of surface sediments (0-20 cm) from Carlos Botelho (Lobo-Broa) Reservoir was conducted during the dry season in April 2014. Sediment parameters were measured in situ. The geochemical speciation of metals was carried out using the modified three-stage BCR-701 procedure (Davutluoglu et al., 2011) and compared with pseudo-total metal contents. Findings Contamination at S-1 and S-8 was more severe than other sampling sites, especially for Cu, Ni, Pb and Zn. Metals such as Cu, Ni and Zn occasionally may be associated with adverse biological effects based on the comparison with sediment quality guidelines. The risk assessment code suggests no risk for Fe and low risk for Cu and Ni. Originality/value Geochemical speciation of metals could be useful in developing effective management strategies to control metal pollution in the Lobo-Broa Reservoir. Substantial amounts of Pb (classified as medium risk) were bound to humic substances and/or insoluble metal sulfides, and could pose serious risk to the benthic community through the food chain. Zinc at S-1, S-3 and S-8 showed high risk, indicating that an appreciable portion of Zn could be available to aquatic biota.

Risk Assessment of Organochlorine Compounds in Water and Surface Sediments from Taihu Lake and Nanjing Section of Changjiang, China

2011 ◽  
Vol 356-360 ◽  
pp. 624-629 ◽  
Author(s):  
Xu Yin Yuan ◽  
Quan Liu ◽  
Ji Zhou Li ◽  
Jun Feng Ji ◽  
Chang Ping Mao
Keyword(s):  
Risk Assessment ◽  
Surface Water ◽  
Ecological Risk ◽  
Surface Sediments ◽  
Taihu Lake ◽  
Sediment Quality ◽  
Organochlorine Compounds ◽  
Quality Guidelines ◽  
Water And Sediment ◽  
Low Levels

Samples of surface water and sediment were collected in Taihu Lake and Nanjing section of Changjiang. Organochlorine compounds(OCCs) of samples were detected to investigate the characteristics and ecological risk of them in the lake and river. The concentrations of OCCs in water of Nanjing section of Changjiang were higher than those in Taihu Lake, but the concentrations of OCCs in sediments were higher in Taihu Lake. HCHs of Taihu sediments were relatively enriched, indicating the agricultural source of compounds. PCBs of Changjiang sediments were higher compared to Taihu sediments, denoting a obvious industrial source. Comparing with other compartments in China, HCHs of the study area were higher than most sediment of Chinese rivers, DDTs didn’t show high contents in sediments, PCBs was in relatively low levels. By contrast with the relevant sediment quality guidelines of these compounds, the ecological risk of OCCs in sediments were evaluated. The OCCs of sediments in Taihu Lake and Nanjing section of Changjiang didn’t show high ecological risk.

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